Vibration Generating Apparatus for Display Panel Sound
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional electronic devices with separate speakers for display apparatuses face space constraints and sound quality degradation due to soundwave interference, limiting design and immersion experience.
Innovation Solution
An electronic apparatus with a vibration member and vibration generating apparatus that vibrates to direct sound forward, enhancing sound quality and pressure characteristics by controlling air impedance and using a film-type vibration apparatus for a slim structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a separate speaker is used in a display apparatus, then sound can be output, but the speaker occupies space and limits design freedom
Solution Approach 1:
The patent merges the speaker function with the display panel by making the display panel itself serve as the vibration member. The backlight unit is removed and replaced with vibration apparatuses (piezoelectric actuators) that directly vibrate the display panel to generate sound, eliminating the need for a separate speaker component and thereby freeing up space while maintaining design freedom.
Solution Approach 2:
The display panel is given dual functionality: it serves both as the display surface and as the sound-generating vibration member. By integrating the acoustic function into the display panel, the apparatus achieves multi-functionality, allowing the same component to perform both visual display and sound output without requiring additional dedicated space for a separate speaker.
2Device complexity
If sound is output in rearward or downward direction, then speaker structure is simplified, but sound quality is degraded due to interference between soundwaves reflected from walls and floor
Solution Approach 1:
Instead of outputting sound in the conventional rearward or downward direction, the patent inverts the sound output direction to forward direction. The vibration apparatuses are positioned to vibrate the display panel in a manner that directs sound waves forward toward the viewer, avoiding reflection from walls and floor, thereby preventing sound quality degradation while maintaining a simplified structure.
Solution Approach 2:
The patent converts the potential harm of soundwave reflection into a benefit by changing the sound output direction. By directing sound forward rather than rearward or downward, the design eliminates the harmful reflection effect and creates a beneficial immersive sound experience where sound waves directly reach the viewer without interference, effectively turning a potential problem into an advantage.
3Length of stationary object
If a film-type vibration apparatus is used, then the structure becomes slim, but achieving high sound pressure levels becomes more difficult
Solution Approach 1:
The patent divides the sound generation function into multiple segments by using a plurality of vibration apparatuses (first, second, third, and fourth vibration apparatuses) positioned at different locations on the rear surface of the display panel. This segmentation allows each individual film-type vibration apparatus to operate within its capability while collectively generating high sound pressure levels through coordinated vibration of multiple elements, thus achieving both slim structure and high power output.
Solution Approach 2:
The patent employs composite construction by combining multiple film-type vibration apparatuses with the display panel structure. The vibration apparatuses are integrated into the rear surface of the display panel, creating a composite system that maintains the thin profile of film-type actuators while achieving enhanced sound pressure levels through the combined effect of multiple vibration sources working in unison.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Improves sound quality and immersion by directing sound forward, reducing interference and allowing for a slim, high-pitched sound band with enhanced sound pressure levels.
Implementation Method 1
a first vibration apparatus disposed at a rear surface of the first cover and configured to cover the first hole, the first vibration apparatus being configured to vibrate the vibration member
Implementation Method 2
a first enclosure member disposed at the rear surface of the first cover and configured to cover the first hole and the first vibration apparatus
Data Source
AI summary
A vibration generating apparatus for use with a vibration member includes a support member including a first hole and a second hole, a first vibration device disposed at the first hole, a second vibration device disposed at the second hole, and an enclosure member connected to a rear surface of the vibration member and configured to cover the support member, the first vibration device, and the second vibration device.